161213029 has 2 divisors, whose sum is σ = 161213030. Its totient is φ = 161213028.

The previous prime is 161212999. The next prime is 161213047. The reversal of 161213029 is 920312161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88792929 + 72420100 = 9423^2 + 8510^2 .

It is a cyclic number.

It is not a de Polignac number, because 161213029 - 2⁹ = 161212517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161212994 and 161213012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161213089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80606514 + 80606515.

It is an arithmetic number, because the mean of its divisors is an integer number (80606515).

Almost surely, 2^161213029 is an apocalyptic number.

It is an amenable number.

161213029 is a deficient number, since it is larger than the sum of its proper divisors (1).

161213029 is an equidigital number, since it uses as much as digits as its factorization.

161213029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 161213029 is about 12696.9692840457. The cubic root of 161213029 is about 544.2520154501.

It can be divided in two parts, 1612 and 13029, that added together give a palindrome (14641).

The spelling of 161213029 in words is "one hundred sixty-one million, two hundred thirteen thousand, twenty-nine".